"We used it to look for insurgent firing points and check out exposed areas of the ground before crossing, which is a real asset. It is very easy to operate and offers amazing capability to the guys on the ground."

The nano helicopter has been developed by Prox Dynamics AS of Norway as part of a £20m contract for 160 units with Marlborough Communications Ltd (MCL), Surrey.

Philip Dunne, Minister for Defence Equipment, Support and Technology, said: "Black Hornet gives our troops the benefits of surveillance in the palm of their hands. It is extremely light and portable whilst out on patrol.

"Intelligence, surveillance and reconnaissance systems are a key component in our 10-year equipment plan and now that we have balanced the defence budget we are able to confidently invest in these kinds of cutting-edge technologies."